Well, his overall MLB sample size is pretty small too, but that didn't stop Nick from saying "Hildenberger single-handedly changes the outlook of the bullpen going forward dramatically."
I think it's fair to pump the brakes a bit on that. I don't want the team to say "the bullpen is just fine with minimal changes" yet again this winter...
I think he changes it for the rest of the season? He has a hot hand and gives Molyl someone he can hand the ball to in a late game with some confidence (perhaps misplaced but confidence nonetheless). I'd agree with you about going forward into next year though, it's too early to tell.
That said, I don't want the Twins throwing money around in bullpen free agency for next year. There are a lot of young arms coming up and I don't want them blocked by guys who are a crapshoot. I'd like to see the Twins make a few low-risk free agent pickups like the did with Belisle/Breslow.
I'm not ready to give up on Duffey, Pressley etc. like many here seem to be. I'm also hopeful that a number of minor league guys are going to be coming back from injury and can hopefully contribute. The Twins have a lot of fun young arms and I'd like to see them bringing in some low cost vets to supplement the growing pains of young guys.
Mostly, I'd like them to make some decisions on whether guys like Gee, Hurlbut, Sledgers are starters or relievers in the long term. If they're not starters (and I doubt anyone except maybe Slegers is), they should start working them as relievers. Taylor Rogers shows the benefits of doing that (and to a lesser extent Gee, though he's been used as a long man and not a set-up guy).